Flight Controls Flashcards
Re: multi function spoilers…
Outboard spoilers are referred to as?
Inboard spoilers “. “. “?
Outboard spoilers= spoilerons
Inboard spoilers= flight spoilers
Multi function spoilers consist of?
Spoilerons and flight spoilers
Multi functional spoilers used for?
To assist the ailerons for turn coordination
Also used for ground lift dumping
Rudder travel limiter?
The SSCU reduces travel from 33° to 4 as speed increases
Avoids over stressing fuselage at high speeds
Prevents severe Sideslip
During SPLR/STAB IN TEST?
Advisory
do not move rudder pedals
Nose wheel steering tiller
Disengage stabilizer trim
Or select any hydraulic pump switch to for auto
Test last up to 60 seconds
SPOST2.. Performed following aircraft power up, once per 50 flight cycles
How many leading-edge slats per wing?
3
How many trailing edge flaps?
2
What’s drives the flaps?
a PDU
What’s commands the PDU to deploy or retract the slats and flaps?
The SFECU’s
Slat/flaps electronic control units
If airspeed is too high for selected flap setting?
Over speed Clacker
When do we have half speed flaps?
When one of the two PDU’s fail
Emergency flap switch selects the flaps to?
20°
Actuated by the SFECU
Under 230 kn
Each spoiler is actuated by?
A single electro hydraulic PCU
Power control unit
What controls spoiler operation?
Spoiler stabilizer control units(SSCU)
2-dual channel
Roll assist is provided by?
Multi functional spoilers
Primary flights controls?
Ailerons
Rudder
Elevators
Spoilerons
Aileron.. Autopilot is connected to which side?
First officer side
How many PCU’s Power the ailerons?
2/side
Hydraulic
Mechanically controlled by either control wheel
Function of the flutter dampers?
Prevent surface flutter in the event of hydraulic fluid loss at the PCUs during flight
Gust lock function on the ground
If roll disconnect handle is pulled?
Unaffected aileron and opposite side spoileron
20 seconds…ROLL SEL
SPOILERON ROLL CAUTION
press ROLL SEL on operable side
( allows use of both spoilerons)
Aileron AP servo connected to?
Rt elevator stystem
What automatically controls operation of the spoilers?
SSCU’s
Spoiler stabilizer control units
Ailerons..
Operated?
Controlled?
Electrically operated
Manually controlled
Control jam of rudder?
Pedals remain operable through anti-jam mechanisms
Does operation of the rudder trim cause rudder deflection?
No!
Each yaw damper response to inputs from
One flight control computer
One yaw damper must be engaged for the autopilot
Stall protection system is connected to which side?
Right elevator system
Autopilot is connected to which elevator system?
Left elevator system
4 modes to the SSCU
Manual trim
Autopilot trim Auto trim( flaps extended or retracted 0-20 )
Mach trim(for pitch down tendencies when ap disengaged)
How many PCU’s per spoiler?
1 PCU /spoiler
When is roll assist used?
At low speeds on the downward wing
When aircraft approaches a high angle of attack, The stall protection computer well?
Stick shaker
Continuous ignition
Disengage autopilot
To activate the stick pusher?
Both switches must be selected to on
Horiz stab trim priority?
Pilot Copilot Autopilot Autotrim Mach trim
With AP engaged, high rate of horiz trim mvmt occurs when?
When. Flaps are extending or retracting
Between 0 and 20 eithe direction
9-17 systems
Mach trim oprates when?
Hand flying auto pilot off
Above mach .4
To compensate for increasing pitch down tendencies at increasing mach numbers
If PCU runaway? Remaining PCU’s?
Remaining PCUs override runaway
Yaw damps controlled by?
FCCs
Bute door?
Directs airflow over flaps leafing edge vane
Btms displayed?
Gear and flaps indications
How are the ailerons connected
The ailerons are directly connected to the control yoke through linkage and police
How many aileron Flutter dampers for aileron?
1
When are Flutter dampers visible on the synoptic page?
Only when failed
How many yaw dampers needed for the autopilot
1
Is there a memory item for uncommanded YAW?
Yes
How many PCU ‘s for spoiler!
1
How is the aileron trim switch controlled and operated?
Electronically controlled
Electronically operated
Aileron trim indications on the synoptic page… Color on the ground for neutral position?
In-flight?
Indications green for neutral position on the ground
White once airborne regardless of setting
Function of Bute doors?
Direct air flow over the flaps leading edge then
Where are the two gates on the flap lever?
8° retraction
20° extension
☝🏻
8
20
👇
When do the slat flap position indications appear?
Flaps out of zero
Or
Landing gear extended
BTMS in red range
Is there any to direct linkage for the multifunction spoilers?
No
Fly by wire controlled no direct linkage
Electronic. Signals from the SSCU
What do the PCUs do?
Translate control yoke movements into hydraulic actuation of the ailerons
Are the ailerons independent?
Can be disconnected by a disconnect handle
When the ailerons are disconnected who controls what??
Captain controls left aileron and right MFS
FO controls right aileron and left MFS
How many yaw dampers needed for autopilot
One-yard damper needs to be engaged for the autopilot to engage
MFS?
Flight spoilers
And
Spoilerons
Slowest rate of trim?
Mach trim
fastest=pilot manual trim
Slats actuated?
Electrically(pdu)
Bute doors?
Direct airflow over flaps leading edge vane
Trim clacker??
More than 3 seconds
Mach trim avail abv?
.40
Where is the primary feel unit located?
First officers rudder pedal assembly
Each elevator system is hydraulically powered by how many PCUs
3
How many stab channels need to be engaged for Mach
trim
One channel must be engaged
Are the yaw dampers Partof the auto pilot system
No
the yaw dampers Are independent from the auto pilot system controlled by the flight control computers
The slats flaps And trims are?
Electrically controlled and operated
Hand flying equals mach trim
…
SPOST CHECKS
system power on self test
Every 50th flight cycle
With all 3 hydr systems pressurized
Both stab trim channels engaged
GREEN ADVISORY MESSAGE
-SPLR/STAB IN TEST
TO CONFIG ADVISORY is removed when?
Upon airplane rotation
Stab trim clacker?
More than 3 seconds
Emergency flap switch?
900-20 slats 20 flaps
700-25 slats 20 flaps
Sys 9-23
Emergency flap switch back to normal?
Flaps return to flap switch position
9-23
Slats flaps indications appear?
Slats flaps extended or
Landing gear down or
BTMS red
Slats flap indications removed when?
BTS normal
Gear up
Slats flaps up
When do flaps operate at half speed?
Failure of a single PDU or
One SFECU channel
Half speed when?
Failure of a single PDU or
Loss of one SFECU channel
FLT SPLR DEPLOY CAUTION?
Thrust levers levers at or above climb detent or
Below 300 feet RA
When do we see the Advisor a message TO CONFIG OK
When the aircraft is in a safe takeoff configuration
When is the takeoff config Advisory message removed
Upon airplane rotation
If takeoff config warning? When are the warning indications canceled?
Correctly positioning the applicable control or
Retarding the thrust levers
What is the sequence of events as you approach a stall?
Continuous ign then
Stick shaker then
Pusher, Stall switch lights on glare shield Flash red, warbler sounds
How can you stop the stick pusher?
Pressing and holding either pilots stick push or disconnect switch( AP/SP DISC)
How many STALL PTCT PUSHER switches need to be selected on for stick pusher activation?
Both!!
Therefore if the SPS incorrectly activates the stick pusher, select either STALL PTCT PUSHER switch to off!!
Clacker in reference to the stabilizer trim?
Indicates that stabilizer has been in motion for more than three seconds
When will we get a takeoff config caution in reference to N1?
N1 is greater than 70%
With WOW
TR stowed
